%0 Journal Article %A I. V. Tsenov %T On some questions in the theory of approximation of functions in the spaces $C[a,b]$ и $L^{(s)}[a,b]$ %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1959 %P 184-197 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1959_4_a22/ %G ru %F IVM_1959_4_a22